It was quite clear that in first movie Red skull didnt die but got teleported through the cosmic cube. It could be possible that the red skull character is been saved for captain America trilogy or as a bridge to 3rd avengers movie .
Their might also be a cameo of red skull in this movie .

We don't know where he went, all we know is that he disapeared while holding the Cosmic Cube, and that the Cosmic Cube was in SHIELD's hands for several decade. If it sent him away to whoever knows where, it could bring him back.

Not unless Red Skull learns Loki's "Doors Open From Both Sides" trick. And at this point in the story, if Skully learns/uses that trick, he's going to wind up in Asgard, not Earth.

Quote:

Originally Posted by Brian Braddock

Well, given what's he's previously said about the experience of playing RS, I wouldnt bet on Weaving making a return.

^This. Skull didn't prove to be a particularly popular cinematic villain, and the actor publicly ridiculed the role and wants no part of it. Despite comic-book canon showing Red Skull returning to remain Cap's nemesis in the present day, I don't think that particular route is very high on Marvel Studios' agenda at all.

^This. Skull didn't prove to be a particularly popular cinematic villain, and the actor publicly ridiculed the role and wants no part of it. Despite comic-book canon showing Red Skull returning to remain Cap's nemesis in the present day, I don't think that particular route is very high on Marvel Studios' agenda at all.

Although the RS wasn't developed that well, he is still the second most popular MCU villain.
Source: polls, conversations, him and loki are always remembered.

Why would we even question the fact that a trailer will be released in mid to late September? In fact we should expect it. Marvel has been releasing their first trailers around 7 months prior to the film premier for a while now.